Influence of electrode preparation on the electrochemical performance of LiNi_0.8Co_0.15Al_0.05O₂ composite electrodes for lithium-ion batteries

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• 作者：Hai Yen Tran^a ; Giorgia Greco^a ; Corina T&auml ; ubert^a ; Margret Wohlfahrt-Mehrens^a ; ^{margret.wohlfahrt-mehrens@zsw-bw.de} ; Wolfgang Haselrieder^b ; Arno Kwade^b
• 关键词：Electrode preparation ; LiNi0.8Co0.15Al0.05O2 ; Lithium-ion ; Cathode material
• 刊名：Journal of Power Sources
• 出版年：2012
• 期刊代码：58_03787753
• 类别：ce
• 出版时间：15 July, 2012
• 卷：210
• 期：Complete
• 页码：276-285
• 文件大小：2090 K

摘要

The electrode manufacturing for lithium-ion batteries is based on a complex process chain with several influencing factors. A proper tailoring of the electrodes can greatly improve both the electrochemical performances and the energy density of the battery. In the present work, some significant parameters during the preparation of LiNi_0.8Co_0.15Al_0.05O₂-based cathodes were investigated. The active material was mixed with a PVDF-binder and two conductive additives in different ratios. The electrode thickness, the degree of compacting and the conductive agent type and mixing ratio have proven to have a strong impact on the electrochemical performances of the composite electrodes, especially on their behaviour at high C-rates. Further it has been shown that the compacting has an essential influence on the mechanical properties of NCA coatings, according to their total, ductile and elastic deformation behaviour.